1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.util.lucene;
24  
25  import com.liferay.portal.kernel.util.StringPool;
26  import com.liferay.portal.kernel.util.StringUtil;
27  
28  /**
29   * <a href="KeywordsUtil.java.html"><b><i>View Source</i></b></a>
30   *
31   * @author Brian Wing Shun Chan
32   * @author Mirco Tamburini
33   * @author Josiah Goh
34   */
35  public class KeywordsUtil {
36  
37      public static final String[] SPECIAL = new String[] {
38          "+", "-", "&&", "||", "!", "(", ")", "{", "}", "[", "]", "^", "\"", "~",
39          "*", "?", ":", "\\"
40      };
41  
42      public static String escape(String text) {
43          for (int i = SPECIAL.length - 1; i >= 0; i--) {
44              text = StringUtil.replace(
45                  text, SPECIAL[i], StringPool.BACK_SLASH + SPECIAL[i]);
46          }
47  
48          return text;
49      }
50  
51      public static String toFuzzy(String keywords) {
52          if (keywords == null) {
53              return null;
54          }
55  
56          if (!keywords.endsWith(StringPool.TILDE)) {
57              keywords = keywords + StringPool.TILDE;
58          }
59  
60          return keywords;
61      }
62  
63      public static String toWildcard(String keywords) {
64          if (keywords == null) {
65              return null;
66          }
67  
68          if (!keywords.endsWith(StringPool.STAR)) {
69              keywords = keywords + StringPool.STAR;
70          }
71  
72          return keywords;
73      }
74  
75  }